svd2rust: --edition=2024 missing `unsafe` block for setting `DEVICE_PERIPHERALS`

svd2rust generates:

```rust
#[unsafe(no_mangle)]
static mut DEVICE_PERIPHERALS: bool = false;
```

and later:

```rust
DEVICE_PERIPHERALS = true;
```

but in 2024 edition the above line requires an explicit unsafe block since `#[warn(unsafe_op_in_unsafe_fn)]` is on by default:

```rust
unsafe { DEVICE_PERIPHERALS = true; }
```

which should be applied when the `--edition=2024` flag is used.